ares-test-fuzz-name.c (2639B)
1 /* MIT License 2 * 3 * Copyright (c) The c-ares project and its contributors 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a copy 6 * of this software and associated documentation files (the "Software"), to deal 7 * in the Software without restriction, including without limitation the rights 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 * copies of the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 * 24 * SPDX-License-Identifier: MIT 25 */ 26 #include <stddef.h> 27 #include <stdlib.h> 28 #include <string.h> 29 30 #include "ares.h" 31 /* Include ares internal file for DNS protocol constants */ 32 #include "ares_nameser.h" 33 34 int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size); 35 36 /* Fuzzing on a query name isn't very useful as its already fuzzed as part 37 * of the normal fuzzing operations. So we'll disable this by default and 38 * instead use this same fuzzer to validate our URI scheme parsers accessed 39 * via ares_set_servers_csv() */ 40 #ifdef USE_LEGACY_FUZZERS 41 /* Entrypoint for Clang's libfuzzer, exercising query creation. */ 42 int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size) 43 { 44 /* Null terminate the data. */ 45 char *name = malloc(size + 1); 46 unsigned char *buf = NULL; 47 int buflen = 0; 48 name[size] = '\0'; 49 memcpy(name, data, size); 50 51 ares_create_query(name, C_IN, T_AAAA, 1234, 0, &buf, &buflen, 1024); 52 free(buf); 53 free(name); 54 return 0; 55 } 56 57 #else 58 59 int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size) 60 { 61 ares_channel_t *channel = NULL; 62 char *csv; 63 64 ares_library_init(ARES_LIB_INIT_ALL); 65 ares_init(&channel); 66 67 /* Need to null-term data */ 68 csv = malloc(size + 1); 69 memcpy(csv, data, size); 70 csv[size] = '\0'; 71 ares_set_servers_csv(channel, csv); 72 free(csv); 73 74 ares_destroy(channel); 75 ares_library_cleanup(); 76 77 return 0; 78 } 79 #endif